In the sentence "Ravi Ross used his favorite wooden spoon to stir the nacho cheese," the commas should be placed as follows:
"Ravi Ross used his favorite, wooden spoon, to stir the nacho cheese."
The first comma is used to separate the adjective "favorite" from the noun "wooden spoon." The second comma is used to separate the prepositional phrase "to stir the nacho cheese" from the rest of the sentence.
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